Which of the following is the melting point of ice? 

The correct answer is 273.15 K.

Key Points

• 273.15 K is the melting point of ice under standard atmospheric pressure (1 atm).
• This temperature corresponds to 0°C, which is the freezing point of water in the Celsius scale.
• The Kelvin scale is an absolute temperature scale used in scientific measurements, where 0 K is absolute zero, the point at which molecular motion stops.
• The conversion between Celsius and Kelvin is straightforward: Kelvin = Celsius + 273.15.
• The melting point of ice is a critical reference point in various scientific disciplines, including physics, chemistry, and meteorology.
• At this temperature, water exists in equilibrium between the solid (ice) and liquid (water) states.
• This property is often utilized in calibration of thermometers and other temperature-measuring instruments.

 Additional Information

• 300.15 K
  • 300.15 K corresponds to 27°C, which is a typical room temperature and not related to the melting point of ice.
  • This temperature is often used in scientific studies as the standard for "ambient conditions."
• 373.15 K
  • 373.15 K is the boiling point of water under standard atmospheric pressure (1 atm).
  • This temperature corresponds to 100°C on the Celsius scale.
  • The boiling point is the temperature at which water transitions from the liquid phase to the gaseous phase (steam).
• 200.15 K
  • 200.15 K corresponds to -73°C, which is significantly below the freezing point of water.
  • This temperature is commonly observed in extremely cold environments, such as polar regions or outer space.